Luminous intensity distribution control device and display having the same

Abstract

A liquid crystal display apparatus including: a liquid crystal display element having a liquid crystal layer; a backlight apparatus arranged at one side of the couple of substrates of the liquid crystal display element; a polarizer arranged between the liquid crystal display element and the backlight apparatus; a luminous intensity distribution control element arranged at the other side of the couple of substrates of the liquid crystal display element; an analyzer arranged between the liquid crystal display element and the luminous intensity distribution control element, wherein the luminous intensity distribution control element comprises a transparent base member, a plural lenses arranged on the transparent base member, and a light absorbing layer having small opening portions substantially at focal positions of an individual lens of the plural lenses, and the transparent base member is constituted of a transparent body substantially optically isotropic or a transparent body having uniaxial optical anisotropy.

1. A liquid crystal display apparatus comprising:
 a liquid crystal display element having a liquid crystal layer between a couple of substrates, the liquid crystal display element including optical switch elements for modulating light; 
 a backlight apparatus arranged at one side of said couple of substrates of said liquid crystal display element; 
 a polarizer including a polarized light state converting means for converting polarized states of the light modulated by said optical switch elements, where the polarizer is arranged between said liquid crystal display element and said backlight apparatus; 
 a luminous intensity distribution control element arranged at the other side of said couple of substrates of said liquid crystal display element; 
 an analyzer arranged between said liquid crystal display element and said luminous intensity distribution control element; 
 an observer sensing unit for sensing the presence or absence of an observer; 
 an observer position determining means for determining positions of the observer in the horizontal and vertical directions by sensed signal of said observer sensing unit, and 
 a control signal outputting means for outputting a control signal to said polarized light state converting means based on position information determined by said observer position determining means, 
 wherein 
 said luminous intensity distribution control element comprises a transparent base member, a plural lenses arranged on said transparent base member, and a light absorbing layer having small opening portions substantially at focal positions of an individual lens of said plural lenses, and 
 said transparent base member is constituted of a transparent body substantially optically isotropic or a transparent body having uniaxial optical anisotropy. 
 
     
     
       2. A mar projection type display apparatus comprising:
 a transmission type screen; 
 a projecting apparatus including a light source, a plurality of optical switch elements for modulating lights from said light source in accordance with image information, and a projecting lens for projecting the light modulated by said optical switch elements to said transmission type screen; 
 a polarized light state converting means for converting polarized states of the lights modulated by said optical switch elements; 
 an observer sensing unit for sensing the presence or absence of an observer; 
 an observer position determining means for determining positions of the observer in the horizontal and vertical directions by a sensed signal of said observer sensing unit, and 
 a control signal outputting means for outputting a control signal to said polarized light state converting means based on position information determined by said observer position determining means. 
 
     
     
       3. The rear projection type display apparatus according to  claim 2 , wherein each of the lights modulated by said optical switch elements is a polarized light, and polarized states of said light modulated almost coincide with one another when projecting to said transmission type screen. 
     
     
       4. The rear projection type display apparatus according to  claim 2 , wherein said transmission type screen includes a transparent base member, and
 a number of micro-lenses arranged on the face of the side where said polarized lights are incident. 
 
     
     
       5. The rear projection type display apparatus according to  claim 2 , wherein said transmission type screen includes a light absorbing layer where an opening portion is provided. 
     
     
       6. The rear projection type display apparatus according to  claim 2 , wherein said light modulated is circularly polarized when projecting to said transmission type screen. 
     
     
       7. The rear projection type display apparatus according to  claim 2 , wherein said light modulated is elliptically polarized when projecting to said transmission type screen. 
     
     
       8. The rear projection type display apparatus according to  claim 2 , wherein said light modulated Is linearly polarized when projecting to said transmission type screen. 
     
     
       9. The rear projection type display apparatus according to  claim 2 , wherein said transparent base member is composed of a glass substrate, a triacetylcellulose, a uniaxial stretching polycarbonate film, or an alicyclic acrylic resin.